Combining biotechnology with circular bioeconomy: From poultry, swine, cattle, brewery, dairy and urban wastewaters to biohydrogen

Environmental Research
Alice FerreiraLuisa Gouveia

Abstract

The ability of microalgae to grow in nutrient-rich environments and to accumulate nutrients from wastewaters (WW) makes them attractive for the sustainable and low-cost treatment of WW. The valuable biomass produced can be further used for the generation of bioenergy, animal feed, fertilizers, and biopolymers, among others. In this study, Scenedesmus obliquus was able to remove nutrients from different wastewaters (poultry, swine and cattle breeding, brewery and dairy industries, and urban) with removal ranges of 95-100% for nitrogen, 63-99% for phosphorus and 48-70% for chemical oxygen demand. The biomass productivity using wastewaters was higher (except for poultry) than in synthetic medium (Bristol), the highest value being obtained in brewery wastewater (1025 mg/(L.day) of freeze-dried biomass). The produced biomass contained 31-53% of proteins, 12-36% of sugars and 8-23% of lipids, regardless of the type of wastewater. The potential of the produced Scenedesmus obliquus biomass for the generation of BioH2 through batch dark fermentation processes with Enterobacter aerogenes was evaluated. The obtained yields ranged, in mL H2/g Volatile Solids (VS), from 50.1 for biomass from anaerobically digested cattle WW to 390 for swine...Continue Reading

Citations

Jun 13, 2018·Environmental Technology·Ana Cristina OliveiraLuísa Gouveia
Feb 9, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Elvira Navarro-LópezLuisa Gouveia
Dec 20, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·V DiezC Ramos
Nov 1, 2020·Journal of Environmental Management·Itzel Y López-PachecoRoberto Parra-Saldívar
Aug 14, 2019·Microorganisms·Antonella GuzzonRoberta Congestri
Jan 20, 2021·Trends in Plant Science·Yoong Kit LeongPau Loke Show
Aug 12, 2020·Journal of Environmental Management·Nikita S Kakwani, Pradip P Kalbar
May 29, 2021·The Science of the Total Environment·Carolina Ferrari SilveiraMaria Lúcia Calijuri
Nov 20, 2021·Environmental Science and Pollution Research International·Jessica Muniz MeloDiva Souza Andrade

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